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glibc/iconv/gconv_simple.c

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/* Simple transformations functions.
Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <byteswap.h>
#include <endian.h>
#include <errno.h>
#include <gconv.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <sys/param.h>
#ifndef EILSEQ
# define EILSEQ EINVAL
#endif
/* These are definitions used by some of the functions for handling
UTF-8 encoding below. */
static const uint32_t encoding_mask[] =
{
~0x7ff, ~0xffff, ~0x1fffff, ~0x3ffffff
};
static const unsigned char encoding_byte[] =
{
0xc0, 0xe0, 0xf0, 0xf8, 0xfc
};
/* Transform from the internal, UCS4-like format, to UCS4. The
difference between the internal ucs4 format and the real UCS4
format is, if any, the endianess. The Unicode/ISO 10646 says that
unless some higher protocol specifies it differently, the byte
order is big endian.*/
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 4
#define MIN_NEEDED_TO 4
#define FROM_DIRECTION 1
#define FROM_LOOP internal_ucs4_loop
#define TO_LOOP internal_ucs4_loop /* This is not used. */
#define FUNCTION_NAME __gconv_transform_internal_ucs4
static inline int
internal_ucs4_loop (const unsigned char **inptrp, const unsigned char *inend,
unsigned char **outptrp, unsigned char *outend,
mbstate_t *state, void *data, size_t *converted)
{
const unsigned char *inptr = *inptrp;
unsigned char *outptr = *outptrp;
size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
int result;
#if __BYTE_ORDER == __LITTLE_ENDIAN
/* Sigh, we have to do some real work. */
size_t cnt;
for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4)
*((uint32_t *) outptr)++ = bswap_32 (*(uint32_t *) inptr);
*inptrp = inptr;
*outptrp = outptr;
#elif __BYTE_ORDER == __BIG_ENDIAN
/* Simply copy the data. */
*inptrp = inptr + n_convert * 4;
*outptrp = __mempcpy (outptr, inptr, n_convert * 4);
#else
# error "This endianess is not supported."
#endif
/* Determine the status. */
if (*outptrp == outend)
result = __GCONV_FULL_OUTPUT;
else if (*inptrp == inend)
result = __GCONV_EMPTY_INPUT;
else
result = __GCONV_INCOMPLETE_INPUT;
return result;
}
#ifndef _STRING_ARCH_unaligned
static inline int
internal_ucs4_loop_unaligned (const unsigned char **inptrp,
const unsigned char *inend,
unsigned char **outptrp, unsigned char *outend,
mbstate_t *state, void *data, size_t *converted)
{
const unsigned char *inptr = *inptrp;
unsigned char *outptr = *outptrp;
size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
int result;
# if __BYTE_ORDER == __LITTLE_ENDIAN
/* Sigh, we have to do some real work. */
size_t cnt;
for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4, outptr += 4)
{
outptr[0] = inptr[3];
outptr[1] = inptr[2];
outptr[2] = inptr[1];
outptr[3] = inptr[0];
}
*inptrp = inptr;
*outptrp = outptr;
# elif __BYTE_ORDER == __BIG_ENDIAN
/* Simply copy the data. */
*inptrp = inptr + n_convert * 4;
*outptrp = __mempcpy (outptr, inptr, n_convert * 4);
# else
# error "This endianess is not supported."
# endif
/* Determine the status. */
if (*outptrp == outend)
result = __GCONV_FULL_OUTPUT;
else if (*inptrp == inend)
result = __GCONV_EMPTY_INPUT;
else
result = __GCONV_INCOMPLETE_INPUT;
return result;
}
#endif
static inline int
internal_ucs4_loop_single (const unsigned char **inptrp,
const unsigned char *inend,
unsigned char **outptrp, unsigned char *outend,
mbstate_t *state, void *data, size_t *converted)
{
size_t cnt = state->__count & 7;
while (*inptrp < inend && cnt < 4)
state->__value.__wchb[cnt++] = *(*inptrp)++;
if (cnt < 4)
{
/* Still not enough bytes. Store the ones in the input buffer. */
state->__count &= ~7;
state->__count |= cnt;
return __GCONV_INCOMPLETE_INPUT;
}
#if __BYTE_ORDER == __LITTLE_ENDIAN
(*outptrp)[0] = state->__value.__wchb[3];
(*outptrp)[1] = state->__value.__wchb[2];
(*outptrp)[2] = state->__value.__wchb[1];
(*outptrp)[3] = state->__value.__wchb[0];
#elif __BYTE_ORDER == __BIG_ENDIAN
/* XXX unaligned */
*(*((uint32_t **) outptrp)++) = state->__value.__wch;
#else
# error "This endianess is not supported."
#endif
/* Clear the state buffer. */
state->__count &= ~7;
return __GCONV_OK;
}
#include <iconv/skeleton.c>
/* Transform from UCS4 to the internal, UCS4-like format. Unlike
for the other direction we have to check for correct values here. */
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 4
#define MIN_NEEDED_TO 4
#define FROM_DIRECTION 1
#define FROM_LOOP ucs4_internal_loop
#define TO_LOOP ucs4_internal_loop /* This is not used. */
#define FUNCTION_NAME __gconv_transform_ucs4_internal
static inline int
ucs4_internal_loop (const unsigned char **inptrp, const unsigned char *inend,
unsigned char **outptrp, unsigned char *outend,
mbstate_t *state, void *data, size_t *converted)
{
const unsigned char *inptr = *inptrp;
unsigned char *outptr = *outptrp;
size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
int result;
size_t cnt;
for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4)
{
uint32_t inval;
#if __BYTE_ORDER == __LITTLE_ENDIAN
inval = bswap_32 (*(uint32_t *) inptr);
#else
inval = *(uint32_t *) inptr;
#endif
if (inval > 0x7fffffff)
{
*inptrp = inptr;
*outptrp = outptr;
return __GCONV_ILLEGAL_INPUT;
}
*((uint32_t *) outptr)++ = bswap_32 (*(uint32_t *) inptr);
}
*inptrp = inptr;
*outptrp = outptr;
/* Determine the status. */
if (*outptrp == outend)
result = __GCONV_FULL_OUTPUT;
else if (*inptrp == inend)
result = __GCONV_EMPTY_INPUT;
else
result = __GCONV_INCOMPLETE_INPUT;
return result;
}
#ifndef _STRING_ARCH_unaligned
static inline int
ucs4_internal_loop_unaligned (const unsigned char **inptrp,
const unsigned char *inend,
unsigned char **outptrp, unsigned char *outend,
mbstate_t *state, void *data, size_t *converted)
{
const unsigned char *inptr = *inptrp;
unsigned char *outptr = *outptrp;
size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
int result;
size_t cnt;
for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4, outptr += 4)
{
if (inptr[0] > 0x80)
{
/* The value is too large. */
*inptrp = inptr;
*outptrp = outptr;
return __GCONV_ILLEGAL_INPUT;
}
# if __BYTE_ORDER == __LITTLE_ENDIAN
outptr[3] = inptr[0];
outptr[2] = inptr[1];
outptr[1] = inptr[2];
outptr[0] = inptr[3];
# else
outptr[0] = inptr[0];
outptr[1] = inptr[1];
outptr[2] = inptr[2];
outptr[3] = inptr[3];
# endif
# if __BYTE_ORDER == __LITTLE_ENDIAN
outptr[3] = inptr[0];
outptr[2] = inptr[1];
outptr[1] = inptr[2];
outptr[0] = inptr[3];
# else
outptr[0] = inptr[0];
outptr[1] = inptr[1];
outptr[2] = inptr[2];
outptr[3] = inptr[3];
# endif
}
*inptrp = inptr;
*outptrp = outptr;
/* Determine the status. */
if (*outptrp == outend)
result = __GCONV_FULL_OUTPUT;
else if (*inptrp == inend)
result = __GCONV_EMPTY_INPUT;
else
result = __GCONV_INCOMPLETE_INPUT;
return result;
}
#endif
static inline int
ucs4_internal_loop_single (const unsigned char **inptrp,
const unsigned char *inend,
unsigned char **outptrp, unsigned char *outend,
mbstate_t *state, void *data, size_t *converted)
{
size_t cnt = state->__count & 7;
while (*inptrp < inend && cnt < 4)
state->__value.__wchb[cnt++] = *(*inptrp)++;
if (cnt < 4)
{
/* Still not enough bytes. Store the ones in the input buffer. */
state->__count &= ~7;
state->__count |= cnt;
return __GCONV_INCOMPLETE_INPUT;
}
if (((unsigned char *) state->__value.__wchb)[0] > 0x80)
/* The value is too large. */
return __GCONV_ILLEGAL_INPUT;
#if __BYTE_ORDER == __LITTLE_ENDIAN
(*outptrp)[0] = state->__value.__wchb[3];
(*outptrp)[1] = state->__value.__wchb[2];
(*outptrp)[2] = state->__value.__wchb[1];
(*outptrp)[3] = state->__value.__wchb[0];
#elif __BYTE_ORDER == __BIG_ENDIAN
(*outptrp)[0] = state->__value.__wchb[0];
(*outptrp)[1] = state->__value.__wchb[1];
(*outptrp)[2] = state->__value.__wchb[2];
(*outptrp)[3] = state->__value.__wchb[3];
#endif
/* Clear the state buffer. */
state->__count &= ~7;
return __GCONV_OK;
}
#include <iconv/skeleton.c>
/* Similarly for the little endian form. */
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 4
#define MIN_NEEDED_TO 4
#define FROM_DIRECTION 1
#define FROM_LOOP internal_ucs4le_loop
#define TO_LOOP internal_ucs4le_loop /* This is not used. */
#define FUNCTION_NAME __gconv_transform_internal_ucs4le
static inline int
internal_ucs4le_loop (const unsigned char **inptrp, const unsigned char *inend,
unsigned char **outptrp, unsigned char *outend,
mbstate_t *state, void *data, size_t *converted)
{
const unsigned char *inptr = *inptrp;
unsigned char *outptr = *outptrp;
size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
int result;
#if __BYTE_ORDER == __BIG_ENDIAN
/* Sigh, we have to do some real work. */
size_t cnt;
for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4)
*((uint32_t *) outptr)++ = bswap_32 (*(uint32_t *) inptr);
*inptrp = inptr;
*outptrp = outptr;
#elif __BYTE_ORDER == __LITTLE_ENDIAN
/* Simply copy the data. */
*inptrp = inptr + n_convert * 4;
*outptrp = __mempcpy (outptr, inptr, n_convert * 4);
#else
# error "This endianess is not supported."
#endif
/* Determine the status. */
if (*outptrp == outend)
result = __GCONV_FULL_OUTPUT;
else if (*inptrp == inend)
result = __GCONV_EMPTY_INPUT;
else
result = __GCONV_INCOMPLETE_INPUT;
return result;
}
#ifndef _STRING_ARCH_unaligned
static inline int
internal_ucs4le_loop_unaligned (const unsigned char **inptrp,
const unsigned char *inend,
unsigned char **outptrp, unsigned char *outend,
mbstate_t *state, void *data,
size_t *converted)
{
const unsigned char *inptr = *inptrp;
unsigned char *outptr = *outptrp;
size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
int result;
# if __BYTE_ORDER == __BIG_ENDIAN
/* Sigh, we have to do some real work. */
size_t cnt;
for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4)
{
outptr[0] = inptr[3];
outptr[1] = inptr[2];
outptr[2] = inptr[1];
outptr[3] = inptr[0];
}
*inptrp = inptr;
*outptrp = outptr;
# elif __BYTE_ORDER == __LITTLE_ENDIAN
/* Simply copy the data. */
*inptrp = inptr + n_convert * 4;
*outptrp = __mempcpy (outptr, inptr, n_convert * 4);
# else
# error "This endianess is not supported."
# endif
/* Determine the status. */
if (*outptrp == outend)
result = __GCONV_FULL_OUTPUT;
else if (*inptrp == inend)
result = __GCONV_EMPTY_INPUT;
else
result = __GCONV_INCOMPLETE_INPUT;
return result;
}
#endif
static inline int
internal_ucs4le_loop_single (const unsigned char **inptrp,
const unsigned char *inend,
unsigned char **outptrp, unsigned char *outend,
mbstate_t *state, void *data, size_t *converted)
{
size_t cnt = state->__count & 7;
while (*inptrp < inend && cnt < 4)
state->__value.__wchb[cnt++] = *(*inptrp)++;
if (cnt < 4)
{
/* Still not enough bytes. Store the ones in the input buffer. */
state->__count &= ~7;
state->__count |= cnt;
return __GCONV_INCOMPLETE_INPUT;
}
#if __BYTE_ORDER == __BIG_ENDIAN
(*outptrp)[0] = state->__value.__wchb[3];
(*outptrp)[1] = state->__value.__wchb[2];
(*outptrp)[2] = state->__value.__wchb[1];
(*outptrp)[3] = state->__value.__wchb[0];
#else
/* XXX unaligned */
*(*((uint32_t **) outptrp)++) = state->__value.__wch;
#endif
/* Clear the state buffer. */
state->__count &= ~7;
return __GCONV_OK;
}
#include <iconv/skeleton.c>
/* And finally from UCS4-LE to the internal encoding. */
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 4
#define MIN_NEEDED_TO 4
#define FROM_DIRECTION 1
#define FROM_LOOP ucs4le_internal_loop
#define TO_LOOP ucs4le_internal_loop /* This is not used. */
#define FUNCTION_NAME __gconv_transform_ucs4le_internal
static inline int
ucs4le_internal_loop (const unsigned char **inptrp, const unsigned char *inend,
unsigned char **outptrp, unsigned char *outend,
mbstate_t *state, void *data, size_t *converted)
{
const unsigned char *inptr = *inptrp;
unsigned char *outptr = *outptrp;
size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
int result;
size_t cnt;
for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4)
{
uint32_t inval;
#if __BYTE_ORDER == __BIG_ENDIAN
inval = bswap_32 (*(uint32_t *) inptr);
#else
inval = *(uint32_t *) inptr;
#endif
if (inval > 0x7fffffff)
return __GCONV_ILLEGAL_INPUT;
*((uint32_t *) outptr)++ = bswap_32 (*(uint32_t *) inptr);
}
*inptrp = inptr;
*outptrp = outptr;
/* Determine the status. */
if (*outptrp == outend)
result = __GCONV_FULL_OUTPUT;
else if (*inptrp == inend)
result = __GCONV_EMPTY_INPUT;
else
result = __GCONV_INCOMPLETE_INPUT;
return result;
}
#ifndef _STRING_ARCH_unaligned
static inline int
ucs4le_internal_loop_unaligned (const unsigned char **inptrp,
const unsigned char *inend,
unsigned char **outptrp, unsigned char *outend,
mbstate_t *state, void *data,
size_t *converted)
{
const unsigned char *inptr = *inptrp;
unsigned char *outptr = *outptrp;
size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
int result;
size_t cnt;
for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4)
{
if (inptr[3] > 0x80)
{
/* The value is too large. */
*inptrp = inptr;
*outptrp = outptr;
return __GCONV_ILLEGAL_INPUT;
}
# if __BYTE_ORDER == __BIG_ENDIAN
outptr[3] = inptr[0];
outptr[2] = inptr[1];
outptr[1] = inptr[2];
outptr[0] = inptr[3];
# else
outptr[0] = inptr[0];
outptr[1] = inptr[1];
outptr[2] = inptr[2];
outptr[3] = inptr[3];
# endif
}
*inptrp = inptr;
*outptrp = outptr;
/* Determine the status. */
if (*outptrp == outend)
result = __GCONV_FULL_OUTPUT;
else if (*inptrp == inend)
result = __GCONV_EMPTY_INPUT;
else
result = __GCONV_INCOMPLETE_INPUT;
return result;
}
#endif
static inline int
ucs4le_internal_loop_single (const unsigned char **inptrp,
const unsigned char *inend,
unsigned char **outptrp, unsigned char *outend,
mbstate_t *state, void *data, size_t *converted)
{
size_t cnt = state->__count & 7;
while (*inptrp < inend && cnt < 4)
state->__value.__wchb[cnt++] = *(*inptrp)++;
if (cnt < 4)
{
/* Still not enough bytes. Store the ones in the input buffer. */
state->__count &= ~7;
state->__count |= cnt;
return __GCONV_INCOMPLETE_INPUT;
}
if (((unsigned char *) state->__value.__wchb)[3] > 0x80)
/* The value is too large. */
return __GCONV_ILLEGAL_INPUT;
#if __BYTE_ORDER == __BIG_ENDIAN
(*outptrp)[0] = state->__value.__wchb[3];
(*outptrp)[1] = state->__value.__wchb[2];
(*outptrp)[2] = state->__value.__wchb[1];
(*outptrp)[3] = state->__value.__wchb[0];
#elif __BYTE_ORDER == __BIG_ENDIAN
(*outptrp)[0] = state->__value.__wchb[0];
(*outptrp)[1] = state->__value.__wchb[1];
(*outptrp)[2] = state->__value.__wchb[2];
(*outptrp)[3] = state->__value.__wchb[3];
#endif
/* Clear the state buffer. */
state->__count &= ~7;
return __GCONV_OK;
}
#include <iconv/skeleton.c>
/* Convert from ISO 646-IRV to the internal (UCS4-like) format. */
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 1
#define MIN_NEEDED_TO 4
#define FROM_DIRECTION 1
#define FROM_LOOP ascii_internal_loop
#define TO_LOOP ascii_internal_loop /* This is not used. */
#define FUNCTION_NAME __gconv_transform_ascii_internal
#define ONE_DIRECTION 1
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
if (*inptr > '\x7f') \
{ \
/* This is no correct ANSI_X3.4-1968 character. */ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
\
/* It's an one byte sequence. */ \
/* XXX unaligned. */ \
*((uint32_t *) outptr)++ = *inptr++; \
}
#include <iconv/loop.c>
#include <iconv/skeleton.c>
/* Convert from the internal (UCS4-like) format to ISO 646-IRV. */
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 4
#define MIN_NEEDED_TO 1
#define FROM_DIRECTION 1
#define FROM_LOOP internal_ascii_loop
#define TO_LOOP internal_ascii_loop /* This is not used. */
#define FUNCTION_NAME __gconv_transform_internal_ascii
#define ONE_DIRECTION 1
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
if (*((uint32_t *) inptr) > 0x7f) \
{ \
/* This is no correct ANSI_X3.4-1968 character. */ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
\
/* It's an one byte sequence. */ \
*outptr++ = *((uint32_t *) inptr)++; \
}
#include <iconv/loop.c>
#include <iconv/skeleton.c>
/* Convert from the internal (UCS4-like) format to UTF-8. */
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 4
#define MIN_NEEDED_TO 1
#define MAX_NEEDED_TO 6
#define FROM_DIRECTION 1
#define FROM_LOOP internal_utf8_loop
#define TO_LOOP internal_utf8_loop /* This is not used. */
#define FUNCTION_NAME __gconv_transform_internal_utf8
#define ONE_DIRECTION 1
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define MAX_NEEDED_OUTPUT MAX_NEEDED_TO
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
uint32_t wc = *((uint32_t *) inptr); \
\
/* Since we control every character we read this cannot happen. */ \
assert (wc <= 0x7fffffff); \
\
if (wc < 0x80) \
/* It's an one byte sequence. */ \
*outptr++ = (unsigned char) wc; \
else \
{ \
size_t step; \
char *start; \
\
for (step = 2; step < 6; ++step) \
if ((wc & encoding_mask[step - 2]) == 0) \
break; \
\
if (outptr + step > outend) \
{ \
/* Too long. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
\
start = outptr; \
*outptr = encoding_byte[step - 2]; \
outptr += step; \
--step; \
do \
{ \
start[step] = 0x80 | (wc & 0x3f); \
wc >>= 6; \
} \
while (--step > 0); \
start[0] |= wc; \
} \
\
inptr += 4; \
}
#include <iconv/loop.c>
#include <iconv/skeleton.c>
/* Convert from UTF-8 to the internal (UCS4-like) format. */
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 1
#define MAX_NEEDED_FROM 6
#define MIN_NEEDED_TO 4
#define FROM_DIRECTION 1
#define FROM_LOOP utf8_internal_loop
#define TO_LOOP utf8_internal_loop /* This is not used. */
#define FUNCTION_NAME __gconv_transform_utf8_internal
#define ONE_DIRECTION 1
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
uint32_t ch; \
uint_fast32_t cnt; \
uint_fast32_t i; \
\
/* Next input byte. */ \
ch = *inptr; \
\
if (ch < 0x80) \
{ \
/* One byte sequence. */ \
cnt = 1; \
++inptr; \
} \
else \
{ \
if (ch >= 0xc2 && ch < 0xe0) \
{ \
/* We expect two bytes. The first byte cannot be 0xc0 or 0xc1, \
otherwise the wide character could have been represented \
using a single byte. */ \
cnt = 2; \
ch &= 0x1f; \
} \
else if ((ch & 0xf0) == 0xe0) \
{ \
/* We expect three bytes. */ \
cnt = 3; \
ch &= 0x0f; \
} \
else if ((ch & 0xf8) == 0xf0) \
{ \
/* We expect four bytes. */ \
cnt = 4; \
ch &= 0x07; \
} \
else if ((ch & 0xfc) == 0xf8) \
{ \
/* We expect five bytes. */ \
cnt = 5; \
ch &= 0x03; \
} \
else if ((ch & 0xfe) == 0xfc) \
{ \
/* We expect six bytes. */ \
cnt = 6; \
ch &= 0x01; \
} \
else \
{ \
/* This is an illegal encoding. */ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
\
if (NEED_LENGTH_TEST && inptr + cnt > inend) \
{ \
/* We don't have enough input. But before we report that check \
that all the bytes are correct. */ \
for (i = 1; inptr + i < inend; ++i) \
if ((inptr[i] & 0xc0) != 0x80) \
break; \
result = (inptr + i == inend \
? __GCONV_INCOMPLETE_INPUT : __GCONV_ILLEGAL_INPUT); \
break; \
} \
\
/* Read the possible remaining bytes. */ \
for (i = 1; i < cnt; ++i) \
{ \
uint32_t byte = inptr[i]; \
\
if ((byte & 0xc0) != 0x80) \
/* This is an illegal encoding. */ \
break; \
\
ch <<= 6; \
ch |= byte & 0x3f; \
} \
\
/* If i < cnt, some trail byte was not >= 0x80, < 0xc0. \
If cnt > 2 and ch < 2^(5*cnt-4), the wide character ch could \
have been represented with fewer than cnt bytes. */ \
if (i < cnt || (cnt > 2 && (ch >> (5 * cnt - 4)) == 0)) \
{ \
/* This is an illegal encoding. */ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
\
inptr += cnt; \
} \
\
/* Now adjust the pointers and store the result. */ \
*((uint32_t *) outptr)++ = ch; \
}
#define STORE_REST \
{ \
/* We store the remaining bytes while converting them into the UCS4 \
format. We can assume that the first byte in the buffer is \
correct and that it requires a larger number of bytes than there \
are in the input buffer. */ \
wint_t ch = **inptrp; \
size_t cnt; \
\
state->__count = inend - *inptrp; \
\
if (ch >= 0xc2 && ch < 0xe0) \
{ \
/* We expect two bytes. The first byte cannot be 0xc0 or \
0xc1, otherwise the wide character could have been \
represented using a single byte. */ \
cnt = 2; \
ch &= 0x1f; \
} \
else if ((ch & 0xf0) == 0xe0) \
{ \
/* We expect three bytes. */ \
cnt = 3; \
ch &= 0x0f; \
} \
else if ((ch & 0xf8) == 0xf0) \
{ \
/* We expect four bytes. */ \
cnt = 4; \
ch &= 0x07; \
} \
else if ((ch & 0xfc) == 0xf8) \
{ \
/* We expect five bytes. */ \
cnt = 5; \
ch &= 0x03; \
} \
else \
{ \
/* We expect six bytes. */ \
cnt = 6; \
ch &= 0x01; \
} \
\
/* The first byte is already consumed. */ \
--cnt; \
while (++(*inptrp) < inend) \
{ \
ch <<= 6; \
ch |= **inptrp & 0x3f; \
--cnt; \
} \
\
/* Shift for the so far missing bytes. */ \
ch <<= cnt * 6; \
\
/* Store the value. */ \
state->__value.__wch = ch; \
}
#define UNPACK_BYTES \
{ \
wint_t wch = state->__value.__wch; \
size_t ntotal; \
inlen = state->__count; \
\
if (state->__value.__wch <= 0x7ff) \
{ \
bytebuf[0] = 0xc0; \
ntotal = 2; \
} \
else if (state->__value.__wch <= 0xffff) \
{ \
bytebuf[0] = 0xe0; \
ntotal = 3; \
} \
else if (state->__value.__wch <= 0x1fffff) \
{ \
bytebuf[0] = 0xf0; \
ntotal = 4; \
} \
else if (state->__value.__wch <= 0x3ffffff) \
{ \
bytebuf[0] = 0xf8; \
ntotal = 5; \
} \
else \
{ \
bytebuf[0] = 0xfc; \
ntotal = 6; \
} \
\
do \
{ \
if (--ntotal < inlen) \
bytebuf[ntotal] = 0x80 | (wch & 0x3f); \
wch >>= 6; \
} \
while (ntotal > 1); \
\
bytebuf[0] |= wch; \
}
#include <iconv/loop.c>
#include <iconv/skeleton.c>
/* Convert from UCS2 to the internal (UCS4-like) format. */
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 2
#define MIN_NEEDED_TO 4
#define FROM_DIRECTION 1
#define FROM_LOOP ucs2_internal_loop
#define TO_LOOP ucs2_internal_loop /* This is not used. */
#define FUNCTION_NAME __gconv_transform_ucs2_internal
#define ONE_DIRECTION 1
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define LOOPFCT FROM_LOOP
#define BODY \
*((uint32_t *) outptr)++ = *((uint16_t *) inptr)++;
#include <iconv/loop.c>
#include <iconv/skeleton.c>
/* Convert from the internal (UCS4-like) format to UCS2. */
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 4
#define MIN_NEEDED_TO 2
#define FROM_DIRECTION 1
#define FROM_LOOP internal_ucs2_loop
#define TO_LOOP internal_ucs2_loop /* This is not used. */
#define FUNCTION_NAME __gconv_transform_internal_ucs2
#define ONE_DIRECTION 1
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
if (*((uint32_t *) inptr) >= 0x10000) \
{ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
*((uint16_t *) outptr)++ = *((uint32_t *) inptr)++; \
}
#include <iconv/loop.c>
#include <iconv/skeleton.c>
/* Convert from UCS2 in other endianness to the internal (UCS4-like) format. */
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 2
#define MIN_NEEDED_TO 4
#define FROM_DIRECTION 1
#define FROM_LOOP ucs2reverse_internal_loop
#define TO_LOOP ucs2reverse_internal_loop/* This is not used.*/
#define FUNCTION_NAME __gconv_transform_ucs2reverse_internal
#define ONE_DIRECTION 1
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define LOOPFCT FROM_LOOP
#define BODY \
*((uint32_t *) outptr)++ = bswap_16 (*(uint16_t *) inptr); \
inptr += 2;
#include <iconv/loop.c>
#include <iconv/skeleton.c>
/* Convert from the internal (UCS4-like) format to UCS2 in other endianness. */
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 4
#define MIN_NEEDED_TO 2
#define FROM_DIRECTION 1
#define FROM_LOOP internal_ucs2reverse_loop
#define TO_LOOP internal_ucs2reverse_loop/* This is not used.*/
#define FUNCTION_NAME __gconv_transform_internal_ucs2reverse
#define ONE_DIRECTION 1
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
uint32_t val = *((uint32_t *) inptr); \
if (val >= 0x10000) \
{ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
*((uint16_t *) outptr)++ = bswap_16 (val); \
inptr += 4; \
}
#include <iconv/loop.c>
#include <iconv/skeleton.c>
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